drm/i915/vrr: Add helper for parsing value to be written into TRANS_PUSH

On Lunarlake and onwards it is possible to generate PSR "frame change"
event using TRANS_PUSH mechanism. As a preparation add new helper to parse
value to be written into TRANS_PUSH register. Setting
LNL_TRANS_PUSH_PSR_PR_EN is done in upcoming change.

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patch.msgid.link/20260127124120.1069026-4-jouni.hogander@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index db74744ddb31a927bbabcbb8ed3923de055b7c2f..f26989c74268dadb0acb612e17e6147150bf600e 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -676,6 +676,22 @@ intel_vrr_dcb_reset(const struct intel_crtc_state *old_crtc_state,
        intel_de_write(display, PIPEDMC_DCB_BALANCE_RESET(pipe), 0);
 }
 
+static u32 trans_vrr_push(const struct intel_crtc_state *crtc_state,
+                         bool send_push)
+{
+       struct intel_display *display = to_intel_display(crtc_state);
+       u32 trans_vrr_push = 0;
+
+       if (intel_vrr_always_use_vrr_tg(display) ||
+           crtc_state->vrr.enable)
+               trans_vrr_push |= TRANS_PUSH_EN;
+
+       if (send_push)
+               trans_vrr_push |= TRANS_PUSH_SEND;
+
+       return trans_vrr_push;
+}
+
 void intel_vrr_send_push(struct intel_dsb *dsb,
                         const struct intel_crtc_state *crtc_state)
 {
@@ -690,8 +706,7 @@ void intel_vrr_send_push(struct intel_dsb *dsb,
 
        intel_de_write_dsb(display, dsb,
                           TRANS_PUSH(display, cpu_transcoder),
-                          TRANS_PUSH_EN | TRANS_PUSH_SEND);
-
+                          trans_vrr_push(crtc_state, true));
        if (dsb)
                intel_dsb_nonpost_end(dsb);
 }
@@ -876,7 +891,8 @@ static void intel_vrr_tg_enable(const struct intel_crtc_state *crtc_state,
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
        u32 vrr_ctl;
 
-       intel_de_write(display, TRANS_PUSH(display, cpu_transcoder), TRANS_PUSH_EN);
+       intel_de_write(display, TRANS_PUSH(display, cpu_transcoder),
+                      trans_vrr_push(crtc_state, false));
 
        vrr_ctl = VRR_CTL_VRR_ENABLE | trans_vrr_ctl(crtc_state);